I made this image a couple of hours ago - it was overcast and cool. I used north light (for the mask/effect). It was a 20 second exposure with my Hermagis lens ~375mm - f/9.
This plate looks a lot better when you are holding it in your hand - believe me! It's hard to copy/scan plates, but especially difficult if they are on clear glass.
Here's a snap of my new camera, too: